Title :

Colorimetric detection of chromium (VI) ion using poly(N-phenylglycine) nanoparticles acting as a peroxidase mimetic catalyst

Author(s) :

Ghayyem, Sena [Auteur]
Swaidan, Abir [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Barras, Alexandre [Auteur]
NanoBioInterfaces - IEMN [NBI - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Dolci, Mathias [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Faridbod, Farnoush [Auteur]
Szunerits, Sabine [Auteur]
NanoBioInterfaces - IEMN [NBI - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Boukherroub, Rabah [Auteur]
NanoBioInterfaces - IEMN [NBI - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

Talanta

Pages :

122082

Publisher :

Elsevier

Publication date :

2021-05-01

ISSN :

0039-9140

English keyword(s) :

Poly(N-phenylglycine) nanoparticles
Peroxidase-like activity
Heavy metals ion
Chromium(VI) ion
Colorimetric detection

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

This paper reports on enzyme-like catalytic properties of polyethylene glycol-functionalized poly(N-phenylglycine) (PNPG-PEG) nanoparticles, which have not been explored to date. The developed nanoparticles have the ability ...
Show more >This paper reports on enzyme-like catalytic properties of polyethylene glycol-functionalized poly(N-phenylglycine) (PNPG-PEG) nanoparticles, which have not been explored to date. The developed nanoparticles have the ability to display great inherent peroxidase-like activity at very low concentrations, and are able to catalyze the oxidation of 3,3',5,5'tetramethylbenzidine (TMB) substrate in presence of hydrogen peroxide (H₂O₂). The oxidized product of TMB has a deep blue color with a maximum absorbance at ~655 nm. The PNPG-PEG nanoparticles exhibit Km values of 0.2828 for TMB and 0.0799 for H₂O₂, indicating that TMB oxidation takes place at lower concentration of H₂O₂ in comparison to other nanozymes. Based on the known mechanism of H₂O₂ oxidation by hexavalent chromium [Cr(VI)] ions to generate hydroxyl radicals (.OH), these nanoparticles were successfully applied for the colorimetric sensing of Cr(VI) ions. The sensor achieved good performance for Cr(VI) sensing with detection limits of 0.012 μM (0.01-0.1 μM linear range) and 0.52 μM (0.05-12.5 μM linear range). The detection scheme was highly selective, and successfully applied for the detection of Cr(VI) in real water samples.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL